How to Password Protect a PDF: Free and Paid Tools Compared

Did you know you can easily password protect PDF files? This powerful feature safeguards sensitive forms, contracts, and documents during email sharing. As PDF experts with years of experience securing business files, we'll guide you through proven free and professional tools to add robust protection.

Know other methods for securing PDFs? Share your tips in the comments below!

How to Password Protect PDFs with Adobe Acrobat Pro DC

Adobe Acrobat Pro DC is a comprehensive PDF suite for creating, editing, and securing files. The Adobe Acrobat Pro DC Mini Guide to Managing PDF Files details its pro-level features. It's $14.99/month after a 7-day free trial and excels at password protection.

Follow these steps in Adobe Acrobat Pro DC:

1. Open the PDF, then from the right-side menu, select Protect.
   
2. In the Protect toolbar, choose Encrypt > Encrypt with Password.
   
3. In the Password Security - Settings dialog, under Document Open Password, check Require a password to open the document and enter your password. Monitor the green strength indicators. Note options for editing and printing permissions, ideal for collaboration.
   
   
4. The Permissions Password section acts as a master key for changes, edits, or restrictions.
   
5. Click OK to apply protection.

Buy now: Adobe Acrobat Pro DC for Windows and Mac ($14.99/month after 7-day free trial)

Best Paid Alternative: novaPDF Pro

A lightweight alternative to Adobe, novaPDF Pro downloads quickly but requires a short learning curve. 4 Very Light Alternatives to Adobe Reader highlights similar efficient tools.

To password protect with novaPDF Pro:

Click Browse, select your PDF, then Open.

Click Create and confirm the printer settings with OK.

In the Save PDF File dialog, check Protect PDF document, then click Passwords. Enter the owner password (yours) and user password (for recipients).

Click Finish and OK. Success is confirmed when the PDF opens prompting for the password.

Note: novaPDF integrates with your existing software (e.g., opens in Adobe). Only the Pro version offers PDF protection; all versions have rich features.

Buy now: novaPDF for Windows ($49.99 after 30-day fully functional trial. Trial PDFs include a footer notice.)

How to Password Protect PDFs for Free

On a tight budget or occasional needs? Try PDFProtect.net. 5 Free Tools for Editing PDF Files covers more no-cost options.

Its online tool is simple:

1. Visit PDFProtect.net.
2. Under File to Protect, upload via Dropbox, Google Drive, or local file.
   
3. Enter password in the Password field and click Protect. Review advanced options first.
   
4. In Advanced Options, set separate open/edit permissions, metadata, copy/print restrictions.
   

Pro tip from our experience: Test permissions thoroughly before sharing, as open passwords differ from print/edit ones. 4 Tips for Securing PDF Documents expands on best practices.

Try now: PDFProtect.net (Browser and Windows versions - Free)

Password Protect PDFs on Your Phone

Protect on-the-go with mobile apps. PDF Password for iOS is user-friendly, supporting owner and user passwords.

Import via iTunes from Mac, Dropbox, Safari, or Open In > PDF Password. Tabs organize imported vs. modified files. Toggle permissions and tap Apply.

How to Access and Manage iCloud Drive Files aids file handling.

Download: PDF Password for iOS ($2.99)

Which PDFs Will You Protect First?

With these methods, confidently secure personal forms and contracts via email. What documents will you protect? Tell us in the comments!